R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02
76 Troubleshooting
1.1 DC generatrix detection
1.2 Voltage check of DC generatrix
1.2.1 Check the voltage of DC generatrix, which is normal between 510V and 580V. If less , go to next step.
1.2.2 Check the rectification circuit. Find out any loose in the circuit. Moreover check the filter board, rectifier
stacks. Mind DC and AC switch on the meter while doing this.
1.2.3 If none of the above works, replace the main control board.
2 Voltage check of module
2.1 The voltage between N and P should be 1.41times to local power supply.
2.2 The voltage between 1 and 2 should range from 510V to 580V
